IF you are physically intack (it seems that 30% of the current memeber MC'ers have a hard time with health issues)....then take an entire day to also WALK/Hike/explore Zion and Bryce. The painted desert you see by automobile - the awsome majesty of their neighbors is best appriciated from below - (although viewed from their heights it lets you imagine how horrific it would be to lose a cow down there.)
You cannot plan it - but bring a tripod - set to the smallest appeture - and shoot after a rainstorm.
Sincerely,
Gargoyle